Adding connections api

includes/functions.php

@@ -180,6 +180,37 @@ function run_fetch(): array {
     return $results;
 }
 
+// ── API queries ───────────────────────────────────────────────────────────────
+
+/**
+ * Return connections from the last $minutes minutes, newest first.
+ * Optionally filtered to a single node.
+ */
+function connections_since(int $minutes = 10, ?int $node_id = null): array {
+    $since = date('Y-m-d H:i:s', time() - $minutes * 60);
+
+    if ($node_id !== null) {
+        $s = db()->prepare(
+            'SELECT c.id, c.occurred_at, c.src_ip, c.src_port, c.dst_port,
+                    c.banner_hex, c.banner_len, n.name AS node_name, n.id AS node_id
+             FROM connections c JOIN nodes n ON n.id = c.node_id
+             WHERE c.node_id = ? AND c.occurred_at >= ?
+             ORDER BY c.occurred_at DESC'
+        );
+        $s->execute([$node_id, $since]);
+    } else {
+        $s = db()->prepare(
+            'SELECT c.id, c.occurred_at, c.src_ip, c.src_port, c.dst_port,
+                    c.banner_hex, c.banner_len, n.name AS node_name, n.id AS node_id
+             FROM connections c JOIN nodes n ON n.id = c.node_id
+             WHERE c.occurred_at >= ?
+             ORDER BY c.occurred_at DESC'
+        );
+        $s->execute([$since]);
+    }
+    return $s->fetchAll();
+}
+
 // ── Dashboard stats ───────────────────────────────────────────────────────────
 
 function global_stats(): array {